import Instrument

class Music:
    def tune(self, i: Instrument.Instrument):
        i.play(Instrument.Note.MIDDLE_C)

    def adjust(self, i: Instrument.Instrument):
        i.adjust()

    def tuneAll(self, i: slice(Instrument.Instrument)):
        for element in i:
            self.tune(element)
            self.adjust(element)
